With only a dusting of snow and warming temperatures, Hall County dodged another round of treacherous winter weather Friday night and Saturday morning, days after a major ice storm toppled trees, ripped down street lights and knocked out power to tens of thousands of homes. The weekend “thaw” tore the remaining chunks of ice from trees, melting the glittering shavings strewn along roadways like so many false diamonds. As public safety officials and road maintenance crews remain on alert with more snow and ice possible over the next week, they are recalling lessons learned in big winter storms over the last few years.